Easy local Windows Kernel exploitation By Cesar Cerrudo
In this paper I detail how to easily exploit some kind of windows kernel vulnerabilities. This is about 3 ..... Load and unload device drivers: allow us to load drivers.
Contents Introduction ............................................................................................................................................. 1 All started with a good paper.................................................................................................................... 1 Making exploitation easier ....................................................................................................................... 2 First trick ................................................................................................................................................. 3 Nulling out ACLs ............................................................................................................................... 4 Second trick ............................................................................................................................................ 4 Enabling privileges ........................................................................................................................... 6 Third trick ................................................................................................................................................ 7 Replacing process token................................................................................................................... 8 Conclusions............................................................................................................................................. 9 Thanks .................................................................................................................................................. 10 References ............................................................................................................................................ 10 Contact.................................................................................................................................................. 10
Technical White Paper
Introduction There was so many things I wanted to do when researching this, but I didn’t have enough time. I wanted to do some statistics about the amount of drivers installed in a regular PC and perform quick security audits on them, but who cares about statistics if we all know that most drivers are full of vulnerabilities and will crash the system if you stare at them for 2 seconds. There will be always vulnerabilities in kernel code. Windows kernel exploitation is still kind of dark art. There are just few papers about Windows kernel exploitation techniques and there are few public good and reliable exploits available. When talking about write “what” “where” exploitation, when you can write some controlled value to a controlled address, there are almost no generic techniques that works across different Windows versions and service pack level. Also some techniques are not reliable and/or complicated. There is no documented easy way to exploit vulnerabilities when “what” is a fixed value, it’s null, or when you can just write one or two bytes. Also no easy way to exploit when you can only increment or decrement the value on “where” or other restrictions. Basically no generic technique for hard to exploit vulnerabilities. Another common thing between most known techniques is that you always end up running code in kernel mode, this could be cool sometimes but it’s not safe and any little mistake will cause a BSOD.
All started with a good paper On January 2010 Matthew “j00ru” Jurczyk and Gynvael Coldwind published “GDT and LDT in Windows kernel vulnerability exploitation” [1]. This is a good paper detailing a technique for Windows
Msg => Message, the event that has occurred, this could be that window has .... //The length of the menu item text - in the case 1 for just a single NULL byte.
Sep 18, 2017 - mmap will fail since there is no call to the 'remap_pfn_range' ..... Call getuid() and check if we are the root user. 5. ... Samsung mobile devices).
operating system as it seems at first glance. .... and attackers can, potentially, make use of vulnerabilities in system ..... and iOS as well as Google's Android.
desktop and mobile platforms: Windows, Linux, Android, OS X, and iOS. In Table 6 ... backwards compatibility with old add-ons and plugins. Moreover ... and signed with a Windows Hardware Quality Lab (WHQL) certificate from Microsoft.
Mar 8, 2013 - Jun 2012: BlackHole developer begins to test this exploit. ... The exploit contains kernel mode shellcode, which .... Just Go Read Apple's.
Mar 8, 2013 - within Adobe Systems, Type 1 BuildChar was designed with the expectation that only error- free Type 1 font programs would be presented to it.
OS X, FreeBSD) and mobile platforms (iOS, An- droid). ... conclusions in section 6. ... mented on the heap with the use of heap canaries. .... fail: call stack chk fail of proc fdinfo read(). GCC requires the canary value to be located at %gs:0x14.
and mobile platforms (iOS, Android). .... Kernel stack is corrupted in c10e1ebf .... INFO: Slab 0xc7fe5900 objects=15 used=10 fp=0xc7aca850 flags=0x400040c0.
and mobile platforms (iOS, Android). .... Kernel stack is corrupted in c10e1ebf .... INFO: Slab 0xc7fe5900 objects=15 used=10 fp=0xc7aca850 flags=0x400040c0.
Jan 16, 2013 - Kernel mode application .... algorithm provider, desired algorithm ID input, an optional specific ... The thread ID of the currently running thread ... List Read with Wait Miss, Cache manager Read Ahead IOs, Cache manager.
Jan 16, 2013 - Microsoft Windows 7 requires authentication from the trusted control ..... The BCryptSignHash() function creates a signature of a hash value.